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The Washington Poison Center in Seattle, Washington reported five cases of argyria that came to its attention within a two-month period in 2002. This condition, in which silver accumulates in the skin, is characterized by a permanent gray-blue skin discoloration.The cases included a 66-year old woman and her husband who used a naturopathic hydrolyzed silver treatment for three years and a 37-year old male who drank an herbal tea containing silver for some ten months.